Final answer:
Psychologists study the brain and behavior using various methods: observational techniques, interviews and questionnaires, and experiments.
Step-by-step explanation:
Psychologists study the brain and behavior using various methods. One approach is through observational techniques, where psychologists observe and document behavior without direct interference. For example, a psychologist could study the behavior of children in a playground to understand social interaction patterns. Another method is through interviews and questionnaires, where psychologists interact with individuals to gather information about their thoughts, feelings, and behaviors. For instance, a psychologist might conduct interviews to explore the motivations behind academic procrastination. Lastly, psychologists also use experiments to study behavior, where they manipulate variables and measure their effects on behavior. For instance, a psychologist could design an experiment to investigate the impact of music on mood.